The creation of an English patch for Shin Sangoku Musou 6 Special PSP is a complex and challenging task. It requires a deep understanding of the game's programming, text encoding, and Japanese language. Several groups and individuals have taken on this challenge, driven by their passion for the game and the desire to make it accessible to a broader audience.
DW7 on PS3 has a full English voice cast. Ripping those audio files and syncing them to PSP events is a massive undertaking – no known patch has attempted this. Shin Sangoku Musou 6 Special Psp English Patch BETTER